US20110141145A1 - Electronic device and method capable of zooming images - Google Patents

Electronic device and method capable of zooming images Download PDF

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Publication number
US20110141145A1
US20110141145A1 US12/779,041 US77904110A US2011141145A1 US 20110141145 A1 US20110141145 A1 US 20110141145A1 US 77904110 A US77904110 A US 77904110A US 2011141145 A1 US2011141145 A1 US 2011141145A1
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US
United States
Prior art keywords
distance value
touch sensitive
zooming
sensitive points
touch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/779,041
Inventor
Hai-Sen Liang
Te-Jia Liu
Hua-Dong Cheng
Chih-San Chiang
Hong-Gang Li
Dong-Chao Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Original Assignee
Hongfujin Precision Industry Shenzhen Co Ltd
Hon Hai Precision Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Hongfujin Precision Industry Shenzhen Co Ltd, Hon Hai Precision Industry Co Ltd filed Critical Hongfujin Precision Industry Shenzhen Co Ltd
Assigned to HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (SHENZHEN) CO., LTD. reassignment HON HAI PRECISION INDUSTRY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHENG, HUA-DONG, CHIANG, CHIH-SAN, LI, Hong-gang, LIANG, HAI-SEN, LIU, Te-jia, YANG, Dong-chao
Publication of US20110141145A1 publication Critical patent/US20110141145A1/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
    • G06F3/0487—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser
    • G06F3/0488—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures
    • G06F3/04883—Interaction techniques based on graphical user interfaces [GUI] using specific features provided by the input device, e.g. functions controlled by the rotation of a mouse with dual sensing arrangements, or of the nature of the input device, e.g. tap gestures based on pressure sensed by a digitiser using a touch-screen or digitiser, e.g. input of commands through traced gestures for inputting data by handwriting, e.g. gesture or text
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/048—Indexing scheme relating to G06F3/048
    • G06F2203/04806—Zoom, i.e. interaction techniques or interactors for controlling the zooming operation

Definitions

  • the present disclosure relates to image zooming technology and, particularly, to an electronic device and a method capable of zooming images.
  • touch panel As an input device, people can directly slide fingers on the touch panel to execute to zoom in and zoom out an displayed image on the display screen. However, it is easy to damage the touch panel to directly slide fingers on.
  • FIG. 1 is a front view of an electronic device capable of zooming images in accordance with an exemplary embodiment.
  • FIG. 2 is a block diagram of the electronic device of FIG. 1 in accordance with an exemplary embodiment.
  • FIG. 3 is a flowchart of a method capable of zooming images in accordance with an exemplary embodiment.
  • an electronic device 1 includes a display screen 10 , a touch panel 11 , and a signal generating circuit 14 .
  • the signal generating circuit 14 is configured for generating signals in response to user touches on the touch panel 11 .
  • the touch panel 11 includes a plurality of touch sensitive points 110 . Each touch sensitive point 110 corresponds to unique coordinates on the touch panel 11 .
  • the electronic device 1 uses the coordinates of the touched touch points 110 to calculate and store a distance between the two touched touch points 110 as D 1 .
  • the electronic device 1 further determines whether two more touch points 110 are simultaneously touched within a preset time interval. The preset time is employed for preventing accidental touches or touches for other purposes being mistaken for zooming commands. If two more touch points 110 are simultaneously touched within the preset time interval, the electronic device 1 further calculates and stores a distance between the two more touch points 110 as D 2 . The electronic device 1 then compares D 1 with D 2 to determine whether to zoom an image displayed on the display screen in or out.
  • the electronic device 1 zooms out the displayed image, otherwise, the electronic device 1 zooms in the displayed image.
  • the electronic device 1 if D 1 ⁇ D 2 , the electronic device 1 zooms in the displayed image.
  • a user wants to zoom in on an image, they should touch the touch panel 11 a first time in two places at the same time, then touch the touch panel 11 again immediately after on two places further apart or vice versa to zoom out.
  • other responses to touches on the touch panel 11 could be employed with the device 1 .
  • the electronic device 1 erases the distance value D 1 . If two more touch points 110 are simultaneously touched within the preset time interval, the electronic device 1 erases both the distance values D 1 and D 2 after executing the zooming function.
  • the electronic device 1 further includes a processing unit 12 , and a storage unit 13 .
  • the processing unit 12 includes a touch determining module 120 , a calculating module 121 , a comparing module 122 , a zooming module 123 , and an erasing module 124 .
  • the touch determining module 120 is configured to determine whether two touch points 110 are simultaneously touched. In the embodiment, if the touch determining module 120 determines two coordinates of two touch points 110 are simultaneously received, the touch determining module 120 determines that the two touch points 110 are simultaneously touched. After determining two touch points have been simultaneously touched, the touch determining module 120 further determines whether two more touch points 110 are simultaneously touched within the preset time interval.
  • the calculating module 121 is configured to calculate the distance between any two touch points 110 being simultaneously touched according to their coordinates, and store the calculated distance in the storage unit 13 .
  • the comparing module 122 is configured to compare the distance D 1 with the distance value D 2 , and generate a comparison result.
  • the zooming module 123 is configured to zoom in and zoom out the displayed image according to the comparison result of D 1 and D 2 . If the comparing module 122 determines the distance value D 1 ⁇ D 2 , the zooming module 123 zooms out the displayed image. Otherwise, the zooming module 123 zooms in the displayed image.
  • the erasing module 124 is configured to erase the distance values stored in the storage unit 13 . In the embodiment, if the distance value D 1 is stored in the storage unit 13 , and the touch determining module 120 determines there are not two more touch points 110 being simultaneously touched within the preset time interval, the erasing module 124 erases the distance value D 1 . If the touch determining module 120 determines two more touch points 110 are simultaneously touched within the preset time interval, the erasing module 124 waits until after executing the zooming function then erases D 1 and D 2 .
  • FIG. 3 a flowchart of a method capable of zooming images in accordance with an exemplary embodiment is shown.
  • step S 30 the electronic device 1 displays an image on the display screen 10 .
  • step S 31 the touch determining module 120 determines whether two touch points 110 are simultaneously touched. If the touch determining module 120 determines two touch points are simultaneously touched, the procedure goes to step S 32 , otherwise, the procedure returns to step S 31 .
  • step S 32 the calculating module 121 calculates the distance value D 1 between the two touched touch points 110 according to their coordinates, and stores D 1 in the storage unit 13 .
  • step 33 the touch determining module 120 further determines whether two more touch points 110 are also simultaneously touched within a preset time interval. If the touch determining module 120 determines two more touch points 110 are simultaneously touched within the preset time interval, the procedure goes to step S 35 , otherwise, the procedure goes to step S 34 .
  • step 34 the erasing module 124 erases D 1 from the storage unit 13 .
  • step 35 the calculating module 121 calculates the distance value D 2 between the two more touched touch points 110 according to their coordinates, and stores D 2 in the storage unit 13 .
  • step 36 the comparing module 122 compares D 1 with D 2 . If D 1 ⁇ D 2 , the procedure goes to step S 37 , otherwise, the procedure goes to S 38 .
  • step 37 the zooming module 123 zooms out the displayed image.
  • step 38 the zooming module 123 zooms in the displayed image.
  • step 39 the erasing module 124 erases D 1 and D 2 from the storage unit 13 .

Abstract

An electronic device includes a display screen, a processing unit, and a touch panel. The touch panel includes touch sensitive units, and each touch sensitive unit can be identified by an unique coordinate. The processing unit determines whether first two touch sensitive points are touched at the same time, and further determines whether two more touch sensitive points are also touched at the same time within a preset time interval. The processing unit calculates distance between the first two touched points and then a distance between the second two touched points. The processing unit compares the first distance value with the second distance value, and zooms in or zoom out a displayed image according to the result. A related method is also provided.

Description

    BACKGROUND
  • 1. Technical Field
  • The present disclosure relates to image zooming technology and, particularly, to an electronic device and a method capable of zooming images.
  • 2. Description of the Related Art
  • Nowadays, more and more electronic devices employ touch panel as an input device, people can directly slide fingers on the touch panel to execute to zoom in and zoom out an displayed image on the display screen. However, it is easy to damage the touch panel to directly slide fingers on.
  • Therefore, it is beneficial to provide an electronic device to overcome the limitations described.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of an electronic device capable of zooming images and a method thereof. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
  • FIG. 1 is a front view of an electronic device capable of zooming images in accordance with an exemplary embodiment.
  • FIG. 2 is a block diagram of the electronic device of FIG. 1 in accordance with an exemplary embodiment.
  • FIG. 3 is a flowchart of a method capable of zooming images in accordance with an exemplary embodiment.
    •  DETAILED DESCRIPTION
  • Referring to FIG. 1, an electronic device 1 includes a display screen 10, a touch panel 11, and a signal generating circuit 14. The signal generating circuit 14 is configured for generating signals in response to user touches on the touch panel 11. The touch panel 11 includes a plurality of touch sensitive points 110. Each touch sensitive point 110 corresponds to unique coordinates on the touch panel 11.
  • In the embodiment, if two touch points 110 are simultaneously touched, the electronic device 1 uses the coordinates of the touched touch points 110 to calculate and store a distance between the two touched touch points 110 as D1. After determining two touch points 110 have been simultaneously touched, the electronic device 1 further determines whether two more touch points 110 are simultaneously touched within a preset time interval. The preset time is employed for preventing accidental touches or touches for other purposes being mistaken for zooming commands. If two more touch points 110 are simultaneously touched within the preset time interval, the electronic device 1 further calculates and stores a distance between the two more touch points 110 as D2. The electronic device 1 then compares D1 with D2 to determine whether to zoom an image displayed on the display screen in or out. In the embodiment, if D1<D2, the electronic device 1 zooms out the displayed image, otherwise, the electronic device 1 zooms in the displayed image. Put simply, if a user wants to zoom in on an image, they should touch the touch panel 11 a first time in two places at the same time, then touch the touch panel 11 again immediately after on two places further apart or vice versa to zoom out. Obviously in other embodiments other responses to touches on the touch panel 11 could be employed with the device 1. It should be noted that in the embodiment if two more touch points 110 are not simultaneously touched within the preset time interval after an initial two touch points 110 are touched, the electronic device 1 erases the distance value D1. If two more touch points 110 are simultaneously touched within the preset time interval, the electronic device 1 erases both the distance values D1 and D2 after executing the zooming function.
  • Referring also to FIG. 2, the electronic device 1 further includes a processing unit 12, and a storage unit 13. The processing unit 12 includes a touch determining module 120, a calculating module 121, a comparing module 122, a zooming module 123, and an erasing module 124.
  • The touch determining module 120 is configured to determine whether two touch points 110 are simultaneously touched. In the embodiment, if the touch determining module 120 determines two coordinates of two touch points 110 are simultaneously received, the touch determining module 120 determines that the two touch points 110 are simultaneously touched. After determining two touch points have been simultaneously touched, the touch determining module 120 further determines whether two more touch points 110 are simultaneously touched within the preset time interval.
  • The calculating module 121 is configured to calculate the distance between any two touch points 110 being simultaneously touched according to their coordinates, and store the calculated distance in the storage unit 13.
  • The comparing module 122 is configured to compare the distance D1 with the distance value D2, and generate a comparison result.
  • The zooming module 123 is configured to zoom in and zoom out the displayed image according to the comparison result of D1 and D2. If the comparing module 122 determines the distance value D1<D2, the zooming module 123 zooms out the displayed image. Otherwise, the zooming module 123 zooms in the displayed image.
  • The erasing module 124 is configured to erase the distance values stored in the storage unit 13. In the embodiment, if the distance value D1 is stored in the storage unit 13, and the touch determining module 120 determines there are not two more touch points 110 being simultaneously touched within the preset time interval, the erasing module 124 erases the distance value D1. If the touch determining module 120 determines two more touch points 110 are simultaneously touched within the preset time interval, the erasing module 124 waits until after executing the zooming function then erases D1 and D2.
  • Referring to FIG. 3, a flowchart of a method capable of zooming images in accordance with an exemplary embodiment is shown.
  • In step S30, the electronic device 1 displays an image on the display screen 10.
  • In step S31, the touch determining module 120 determines whether two touch points 110 are simultaneously touched. If the touch determining module 120 determines two touch points are simultaneously touched, the procedure goes to step S32, otherwise, the procedure returns to step S31.
  • In step S32, the calculating module 121 calculates the distance value D1 between the two touched touch points 110 according to their coordinates, and stores D1 in the storage unit 13.
  • In step 33, the touch determining module 120 further determines whether two more touch points 110 are also simultaneously touched within a preset time interval. If the touch determining module 120 determines two more touch points 110 are simultaneously touched within the preset time interval, the procedure goes to step S35, otherwise, the procedure goes to step S34.
  • In step 34, the erasing module 124 erases D1 from the storage unit 13.
  • In step 35, the calculating module 121 calculates the distance value D2 between the two more touched touch points 110 according to their coordinates, and stores D2 in the storage unit 13.
  • In step 36, the comparing module 122 compares D1 with D2. If D1<D2, the procedure goes to step S37, otherwise, the procedure goes to S38.
  • In step 37, the zooming module 123 zooms out the displayed image.
  • In step 38, the zooming module 123 zooms in the displayed image.
  • In step 39, the erasing module 124 erases D1 and D2 from the storage unit 13.
  • It is understood that the present disclosure may be embodied in other forms without departing from the spirit thereof. Thus, the present examples and embodiments are to be considered in all respects as illustrative and not restrictive, and the disclosure is not to be limited to the details given herein.

Claims (8)

1. An electronic device, comprising:
a display screen;
a touch panel comprises a plurality of touch sensitive points, each touch sensitive points corresponds to unique coordinates on the touch panel;
a signal generating circuit configured for generating signals in response to user touches on the touch panel;
a processing unit comprising:
a touch determining module configured for determining whether two touch sensitive points are simultaneously touched, and further configured for determining whether two more touch sensitive points are simultaneously touched within a preset time interval after determining two touch sensitive points have been simultaneously touched;
a calculating module configured for calculating a first distance between two touch sensitive points being simultaneously touched according to their coordinates, and further configured for calculating a second distance between two more touch sensitive points being simultaneously touched according to their coordinates within the preset time interval;
a comparing module configured for comparing the first distance value and the second distance value, and generating a comparison result;
a zooming module configured for zooming in and zooming out an displayed image on the display screen according to the comparison result generated by the comparing module.
2. The electronic device as recited in claim 1, wherein when the comparing module determines the first distance value is less than the second distance value, the zooming module zooms out the displayed image, and when the comparing module determines the first distance value is greater than the second distance value, the zooming module zooms in the displayed image.
3. The electronic device as recited in claim 1, further comprising a storage wherein when the touch determining module determines there are not two more touch sensitive points being simultaneously touched within the preset time interval, the storage stores the first distance value, and when the touch determining module determines two more touch sensitive points being simultaneously touched within the preset time interval, the storage stores the first distance value and the second distance value.
4. The electronic device as recited in claim 3, wherein the processing unit further comprises an erasing module, when the storage stores the first distance value, the erasing module erases the first distance value once the preset time interval elapses, and when the storage stores the first distance value and the second distance value, the erasing module waits until after executing the zooming function then erases the first distance value and the second distance value.
5. An image zooming method applied in an electronic device, wherein the electronic device comprises a touch panel, and the touch panel comprises a plurality of touch sensitive points beneath, the method comprising:
displaying an image;
determining whether two touch sensitive points are simultaneously touched;
calculating a first distance value between the two touched touch sensitive points according to their coordinates, and storing the first distance value;
determining whether two more touch sensitive points are simultaneously touched within a preset time interval;
calculating a second distance value between the two more touched touch sensitive points according to their coordinates, and storing the second distance value;
comparing the first distance value with the second distance value, and generating a comparison result; and
determining whether to zoom in or zoom out the displayed image according to the comparison result; and
zooming out and in the displayed image according to the comparison result of the first distance value and the second distance value.
6. The method of claim 5, further comprising:
zooming out the displayed image when the first distance value is less than the second distance value;
zooming in the displayed image when the first distance value is larger than the second distance value.
7. The method of claim 5, further comprising:
erasing the first distance value if two touch sensitive points are not simultaneously touched within the preset time interval after the preset time interval elapses.
8. The method of claim 5, further comprising:
erasing the first distance value and the second distance value if two touch sensitive points are simultaneously touched within the preset time interval after zooming in or zooming out the displayed image.
US12/779,041 2009-12-15 2010-05-12 Electronic device and method capable of zooming images Abandoned US20110141145A1 (en)

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CN200910311482A CN101763194A (en) 2009-12-15 2009-12-15 Method and electronic device for realizing zooming of display content on touch pad

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